William Simeon McPhail (2 February 1928 – 4 April 2003) was a Scottish football player who played for Queen's Park, Clyde and Celtic. He scored three goals in Celtic's record 7–1 victory over Rangers in the 1957 Scottish League Cup Final. After retiring, he developed a neurodegenerative disease, which he believed to be a result of brain damage acquired from heading footballs. He was the younger brother of fellow player John McPhail.